Date.prototype.Format = function(fmt) {  
	    // author: meizz  
	    var o = {  
	        "M+" : this.getMonth() + 1, // 月份  
	        "d+" : this.getDate(), // 日  
	        "h+" : this.getHours(), // 小时  
	        "m+" : this.getMinutes(), // 分  
	        "s+" : this.getSeconds(), // 秒  
	        "q+" : Math.floor((this.getMonth() + 3) / 3), // 季度  
	        "S" : this.getMilliseconds()  
	    // 毫秒  
	    };  
	    if (/(y+)/.test(fmt))  
	        fmt = fmt.replace(RegExp.$1, (this.getFullYear() + "").substr(4  
	                - RegExp.$1.length));  
	    for (var k in o)  
	        if (new RegExp("(" + k + ")").test(fmt))  
	            fmt = fmt.replace(RegExp.$1, (RegExp.$1.length == 1)  
	                    ? (o[k])  
	                    : (("00" + o[k]).substr(("" + o[k]).length)));  
	    return fmt;  
	}  
	  
	Date.prototype.addDays = function(d) {  
	    this.setDate(this.getDate() + d);  
	};  
	  
	Date.prototype.addWeeks = function(w) {  
	    this.addDays(w * 7);  
	};  
	  
	Date.prototype.addMonths = function(m) {  
	    var d = this.getDate();  
	    this.setMonth(this.getMonth() + m);  
	  
	    if (this.getDate() < d)  
	        this.setDate(0);  
	};  
	  
	Date.prototype.addYears = function(y) {  
	    var m = this.getMonth();  
	    this.setFullYear(this.getFullYear() + y);  
	  
	    if (m < this.getMonth()) {  
	        this.setDate(0);  
	    }  
	};  
	  
	//js格式化时间  
	Date.prototype.toDateString = function(formatStr) {  
	    var date = this;  
	    var timeValues = function() {  
	    };  
	    timeValues.prototype = {  
	        year : function() {  
	            if (formatStr.indexOf("yyyy") >= 0) {  
	                return date.getYear()+1900;  
	            } else {  
	                return date.getYear().toString().substr(2);  
	            }  
	        },  
	        elseTime : function(val, formatVal) {  
	            return formatVal >= 0 ? (val < 10 ? "0" + val : val) : (val);  
	        },  
	        month : function() {  
	            return this.elseTime(date.getMonth() + 1, formatStr.indexOf("MM"));  
	        },  
	        day : function() {  
	            return this.elseTime(date.getDate(), formatStr.indexOf("dd"));  
	        },  
	        hour : function() {  
	            return this.elseTime(date.getHours(), formatStr.indexOf("hh"));  
	        },  
	        minute : function() {  
	            return this.elseTime(date.getMinutes(), formatStr.indexOf("mm"));  
	        },  
	        second : function() {  
	            return this.elseTime(date.getSeconds(), formatStr.indexOf("ss"));  
	        }  
	    }  
	    var tV = new timeValues();  
	    var replaceStr = {  
	        year : ["yyyy", "yy"],  
	        month : ["MM", "M"],  
	        day : ["dd", "d"],  
	        hour : ["hh", "h"],  
	        minute : ["mm", "m"],  
	        second : ["ss", "s"]  
	    };  
	    for (var key in replaceStr) {  
	        formatStr = formatStr.replace(replaceStr[key][0], eval("tV." + key  
	                + "()"));  
	        formatStr = formatStr.replace(replaceStr[key][1], eval("tV." + key  
	                + "()"));  
	    }  
	    return formatStr;  
	}  
	  
	function formatStrDate(date) {  
	    var str = date.toDateString("yyyy-MM-dd hh:mm:ss");  
	    if (str.indexOf("00:00:00") != -1) {  
	        return str.replace("00:00:00", "10:00:00");  
	    }  
	    return str;  
	}  